Brown rice is low FODMAP. According to Monash University, the leading authority on FODMAP testing, brown rice is safe at standard serving sizes for people following a low FODMAP diet. It contains no significant amounts of the fermentable carbohydrates that trigger symptoms in people with irritable bowel syndrome (IBS).
That said, brown rice can still cause digestive trouble for some people, and the reason has nothing to do with FODMAPs. Understanding why helps you figure out whether it belongs on your plate during the elimination phase.
FODMAP Status of Brown Rice
All plain rice varieties, including brown, white, basmati, and jasmine, test low in FODMAPs. Rice is one of the safest grains on the diet because it’s almost entirely starch, with minimal amounts of the sugars (fructose, lactose, fructans, galactans, and polyols) that the FODMAP framework targets. A typical cooked serving of about one cup (roughly 190 grams) falls well within the green zone.
Monash University completed an updated review of its bread, cereals, rice, and pasta category in February 2025, refreshing traffic light ratings and serving size data across the board. Brown rice retained its low FODMAP rating. If you use the Monash FODMAP app, the latest serving size guidance is reflected there.
Why Brown Rice Still Bothers Some People
If you’ve eaten brown rice and felt worse afterward, you’re not imagining it. Brown rice keeps its outer bran layer intact, and that bran is rich in insoluble fiber. Insoluble fiber moves through the gut quickly without being broken down, and for people with IBS it can trigger diarrhea, gas, and stomach pain. This is a mechanical irritation issue, not a FODMAP issue. The fiber physically stimulates the gut wall, speeding up motility in a digestive system that’s already sensitive.
White rice, by contrast, has the bran stripped away. It’s lower in fiber and generally easier on an irritated gut. During the elimination phase of the low FODMAP diet, if you notice that brown rice is causing problems, switching to white rice is a simple fix that keeps you fully within the diet’s guidelines.
Serving Sizes That Stay Safe
One cup of cooked brown rice is the standard low FODMAP serving. You can eat it freely at meals without stacking FODMAP loads. Unlike many foods on the diet, rice doesn’t have a tight threshold where a slightly larger portion suddenly becomes high FODMAP. It’s one of the more forgiving staples.
Brown rice cakes follow slightly different rules because processing concentrates the grain. The low FODMAP serving for plain rice cakes is 2 cakes. At 4 rice cakes, Monash testing flags them as high FODMAP. So if you snack on rice cakes, keep it to two in a single sitting. Always check the ingredients on flavored varieties, since added seasonings like garlic powder, onion powder, or honey can push an otherwise safe product into high FODMAP territory.
Brown Rice Products to Watch
Plain brown rice is safe, but products made from brown rice aren’t automatically low FODMAP. A few common ones to pay attention to:
- Brown rice pasta: Generally low FODMAP in a standard portion (about one cup cooked), but check app ratings since brands vary in how they process the grain.
- Brown rice flour: Low FODMAP in typical baking amounts. Useful as a substitute in recipes that call for wheat flour.
- Brown rice syrup: This sweetener can contain fructans depending on how it’s manufactured. Treat it with caution and verify before using it liberally.
- Flavored rice mixes: Almost always contain garlic, onion, or other high FODMAP seasonings. Read the label carefully or make your own seasoned rice with safe herbs and garlic-infused oil.
Making Brown Rice Easier to Digest
If you want the nutritional benefits of brown rice (more B vitamins, magnesium, and fiber than white rice) but find it harsh on your stomach, a few adjustments can help. Cooking it with extra water so the grains are softer reduces the mechanical irritation from bran. Eating smaller portions, around half a cup, alongside other foods rather than making it the bulk of your meal also gives your gut less insoluble fiber to deal with at once.
Some people tolerate brown rice better during the reintroduction phase, once their gut has calmed down from the elimination period. If you avoided it early on, it’s worth trying again later to see if your tolerance has shifted. The goal of the low FODMAP diet is to keep your menu as broad as possible, removing only the foods that genuinely cause you problems.